Clamping device for molding flasks



H. URLASS.

CLAMPHIJG DEVIQE FOR MOLDING FLASKS. APPLICATION FILED DEC-29,1921.

1 A3 5, 1 89 Patented Nov. M, 1922.

Off. wlmss Patented Nov. 14, 1922.

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HARRY URLASS OF LA.I\TCASTER, PENNSYLVANIA.

CLAMPING"DEVICE FOR MOLDING FLASKS.

Application filed December 29,1921.- Serial No. 525,602.

To all whom it may concern:

Be it known that I, HARRY Umnssa citi- Zen of the United States, residingat: Lancaster, inthe county ofLancasterand State of Pennsylvania, havewinvented certain new and useful Improvementsin Clamping. Devices for Molding Flasks, of which the following is a specification.

The present invention relates to improvements in clamping devices for molding fiasks, the object in viewsbeing to. provide a Simple: article capable .of. effectively and firmly drawingtogether the parts of the flask and holding them in suchposition during the rammingoperation but. permitting ready release of the moldsections when stripping is to bG'PGlfOIIIlQd.

More particularly, it:may1 be stated. that the primary object of my invention is to provide. a construction of-lock which producesa double drawing or.'clamping-action upon the flask sections by such anarrangement of a cam and clamping element thatin the locking operation one section of: the flask is drawn to the-otherinone-direction, while the latter section is correspondingly drawn to the first section in a direction; at right angles to the first mentioned direction.

It is further my object to provide alocking device of the character mentioned which combines with the clamping feature..means for insuring accurate alignment of the-flask sections.

Theseand such other objects as may hereinafter appear are attained by the novel construction, combination and arrangement ofparts to be hereinafter specifically described and claimed.

Reference will now-be had to the accompanying drawings'forminga; part of this specification wherein:

Figure 1 is aperspectiveview ofaflask having my invention applied thereto.

Figure 2 is a detail view -of-th'elock show ing the clamping section ofthe locking device-in planand in mold locking position.

Figure 3 is a View looking at the device at right angles: to that of Figure 2 and showing in plan the cam section of the looking devlce.

Figure 4 is a sectional view taken about on the plane indicated by the line 4-4 of Figure 2.

Figure 5 is a composite view of the two parts of the device embodying the aligning interlock, means forming a feature of this article.

Referring to the drawing and specifically describingthe invention, it will; be, understood that the clamping device forming the subject-matter hereofis designed especially for-molding flasks, and the embodiment. of the drawing showsits application to a conventional two-part flask, one part being designated A and the other B, these parts being pivotally secured together at the corner C. The meeting end of the section B wherethe clamping device. is attached is rabbeted as indicated at D so. to,.form a shoulder E against which the-end of section A is received.

Bearing this construction in mind, the locking device comprises at'least two. main parts, that which I will term for-purposes of. convenience the cam-part or section 1, and the clamping part or section2. In reality the latter part comprises a base plate 3 which is secured permanently to the flask section by means of the screws 4,: the plate being provided with an apertured boss-.5 upon which is pivotally mounted the clamping member 6, said member being suitably recessed to receive the boss and being secured to the-plate,- by the pivot 7. The boss 5 forms atbearing for the-clamping member and relieves the pivot ofmuch of the stresses imparted by the clamping action. The lockingmember 6, as best seen in'FigureQ, is

provided at one end. with a wing 8 and at its opposite end with acorresponding wing 9, so that it-ismanipulated very much like a wing nut. The offstanding end of the clamping member, beneath the juncture of the wing 9 withthe body,ris formed wlth a clamping finger or hoolr .10 which coacts with the cam section 1 of the locking-member to produce the peculiar. clamping effect which will be later described.

Referring to the cam section 1, it will be observed by reference to Figure 4f that a shoulder 11 is formed atv an intermediate I point so as to engage with the edge of the flask: section'A to which the cam sect-ionis secured-by means of suitable screws 12. At the free end of this member is formed a lateral flange 13 which has an edge cam face 14 and a second cam or side cam face 15,

' the latter being formed by a thickening of the metal at the upper part as shown at 15 in Figure 3. In the cooperation of the clamping member 6 with the cam section 1, the hook 10 engages about this flange and as the member 6 is rotated the shank of the hook rides upon the edge cam 14 while the end of the hook rides on the side cam face 15. camming action in that the cam 15 draws the section B tightly against the meeting end of the section A. while the cam 14 draws the side of the meeting end of section A against the shoulder E, referred to above, of section B. A very tight clamp is thus produced by a simple rotation of the revoluble member 6. A very slight tap upon the wing 9 will cause the member 6 to release the sec tions of the flask when it is desired to strip.

A. further feature which. is not infrequently accomplished by aligning means separate and distinct from flask locks, resides in the formation of the parts of my device with an aligning interlock that produces the aligning at the time the locking device is brought into play. In other words. as shown in Figure the part 1. at its edge is provided with a recess or socket 17 to receive a projecting lug or tongue 18 on the plate 3, so that as the flask is closed this tapered tongue will slide into a correspondingly formed seat to automatically align the flask sections accurately as desired at the same time that the locking ofthe flask sections together takes place.

A very simple and effective article of manufacture is thus provided by this device, and I desire it to be particularly understood that I do not confine myself to the application of the locking means to flasks as it may be employed elsewhere with equal effectiveness. Furthermore, slight changes in the details of construction may be made without departing from the spir t of the invention and within the scope of the claims hereto appended.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is: l

' 1. A clamping device for molding flasks comprising a sect-ion having a flange pro vided with double cam faces, and a clamping member having means engageable with each of the cam faces to produce a clamping action in two directions.

2. A clamping device for molding flasks comprising a section having at one end thereof a laterally projecting flange formed with edge and sidecam faces, and a clamping member pivotally mounted and formed This cooperation produces a double.

to engage about the flange so as to ride upon each of the cam faces aforesaid.

3. ii clamping device for molding flasks comprising a member secured to one of t flask sections and provided at its end cam faces arranged at angles to each ct 1m, and a clamping member pivotally securcrl to the other flask section and having a clamping finger formed to engage the cam faces aforesaid to thereby produce a clamping action of the mold sections in two directions.

i. A clamping device for molding flasks or the like comprising a cam memlm.v mounted upon one of the flask sections, and a clamping member mounted on the other of said mold section's engage-able with the cam member, and aligning means on said members adapted to interlock in the closing of the flask sections.

5. A clamping device for molding flasks or the like comprising a cam member attached. to one of the sections of the flask,

and a clamping member attached to the other section of the flask, one of said members being provided witha recess and the other with a lug projection adapted to engage in the said recess to align the flask sections as an incident to the clamping action by the clamping member.

6. A clamping device for molding flasks or the like comprising a member attached to one of the flask sections having a cam surface and a socket, and a clamping member attached to the other flask section and comprising an attaching plate having an aligning lug adapted to be received in the socket aforesaid and .a clamping member mounted upon, said plate engageable with said cam face to thereby clamp the flask sections together and simultaneously align said sections.

7. A. clamping device for molding flasks or the like comprising a member having a double cam formed thereon and attached to one section of the mold flask, ands clamping member attached to the other section of the mold flask and including-an attaching plate and a rotatable clamping member formed with diametrically opposed wing elements for manipulating the clamping member-and having a clamping finger projecting therefrom engageable with the two cam faces aforesaid.

In testimony whereof I aflix iny signature,

- HARRY URLASS. 

